55451889 has 12 divisors (see below), whose sum is σ = 80311296. Its totient is φ = 36869112.

The previous prime is 55451843. The next prime is 55451911. The reversal of 55451889 is 98815455.

It is a happy number.

55451889 is a `hidden beast` number, since 5 + 54 + 518 + 89 = 666.

It is not a de Polignac number, because 55451889 - 2⁷ = 55451761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55451819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4597 + ... + 11490.

It is an arithmetic number, because the mean of its divisors is an integer number (6692608).

Almost surely, 2^55451889 is an apocalyptic number.

It is an amenable number.

55451889 is a deficient number, since it is larger than the sum of its proper divisors (24859407).

55451889 is a wasteful number, since it uses less digits than its factorization.

55451889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16476 (or 16473 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 55451889 is about 7446.6025138985. The cubic root of 55451889 is about 381.3339292424. Note that the first 3 decimals are identical.

The spelling of 55451889 in words is "fifty-five million, four hundred fifty-one thousand, eight hundred eighty-nine".